(19)

(11)

EP 4 327 043 A1

(12)

(43) Date of publication: 28.02.2024 Bulletin 2024/09 (21) Application number: 22722869.9 (22) Date of filing: 07.04.2022

(51) International Patent Classification (IPC):  F41H 11/02(2006.01) F42B 21/00(2006.01) F42B 15/22(2006.01) (52) Cooperative Patent Classification (CPC): F41H 11/02; F42B 21/00; F42B 15/22 (86) International application number: PCT/GB2022/050870 (87) International publication number: WO 2022/223942 (27.10.2022 Gazette 2022/43)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.04.2021 GB 202105538 (71) Applicant: BAE SYSTEMS plc London SW1Y 5AD (GB)	(72) Inventors: CARR, Andrew Michael Portsmouth Hampshire PO3 5PQ (GB) LEWIN, Richard Peter Barrow-in-Furness Cumbria LA14 1AF (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Warwick House P.O. Box 87 Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU Farnborough Hampshire GU14 6YU (GB)